nag_gamma_dist (g01efc) Example Program Results
 Gamma deviate    Alpha     Beta    Lower tail prob.

     15.50         4.00     2.00        0.9499
      0.50         4.00     1.00        0.0018
     10.00         1.00     2.00        0.9933
      5.00         2.00     2.00        0.7127